Towards quantum-resistant cryptosystems from supersingular elliptic curve isogenies

DOI Web Site Web Site 16 Citations
  • Luca De Feo
    Laboratoire PRiSM, Université de Versailles, 78035 Versailles, France
  • David Jao
    University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada
  • Jérôme Plût
    Laboratoire PRiSM, Université de Versailles, 78035 Versailles, France

Description

<jats:title>Abstract</jats:title> <jats:p>We present new candidates for quantum-resistant public-key cryptosystems based on the conjectured difficulty of finding isogenies between supersingular elliptic curves. The main technical idea in our scheme is that we transmit the images of torsion bases under the isogeny in order to allow the parties to construct a shared commutative square despite the non-commutativity of the endomorphism ring. We give a precise formulation of the necessary computational assumptions along with a discussion of their validity, and prove the security of our protocols under these assumptions. In addition, we present implementation results showing that our protocols are multiple orders of magnitude faster than previous isogeny-based cryptosystems over ordinary curves. This paper is an extended version of [Lecture Notes in Comput. Sci. 7071, Springer (2011), 19–34]. We add a new zero-knowledge identification scheme and detailed security proofs for the protocols. We also present a new, asymptotically faster, algorithm for key generation, a thorough study of its optimization, and new experimental data.</jats:p>

Journal

Citations (16)*help

See more

Report a problem

Back to top